So I have an optional objective to search the Caravan, I watched Youtube and know what to do except it won't let me pick up the lemonade on the floor, I asked Piper to pick it up but she won't, it doesn't even highlight and I need to pick it up to finish the optional objective, any ideas? This game is just full of glitches grr!

There was also a lemonade in a container there (meds cooler perhaps) for me - whether that was random or not I'm not sure.

I believe it's a known glitch. The cooler can also be glitched. I am not aware of any fix. It doesn't stop you from completing the quest, but I don't think you can get the optional objective once the glitch occurs.

Yeah can't touch the one in the cooler either, totally svcks.